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Troubleshoot dryers and steam & condensate systems, part 2

Dryers and S&C systems involve complicated interdependent process values. Here are practical tips to troubleshoot and operate steam & condensate systems.

Smooth extended nip press (ENP) change-out, a case study

Valmet supervised the change-out of an ENP module. This included a preliminary NipScan and audit of the press and hydraulic units to spot potential problems.

Measuring winder capacity - calculation and interpretation

There are many reasons to increase winder capacity. Speed up / quality are easy to predict, however operational / maintenance related issues are more difficult.

Web holder design, principle of operation and maintenance

Web holders maintain tension in a threaded sheet during a splicing or set change sequence. Typically located next to a guide roll or under a rear drum.

Tips for troubleshooting your roll grinding application

A list of common problems incurred in roll grinding applications and their possible causes. Often, several conditions accumulate to create the problem.

Keep your machine calender in tune with changing production

For many grades, the machine calender is the last chance to affect sheet properties. Production variations can reduce the effectiveness of a machine calender.

Coater service case study - Removing OMC coating buildup

Valmet assisted in cleaning the blade holders, replacing the cross machine coater station profile strips and adjusting a return pan to reduce color leaks.

Reel service case study - Faulty turnups and mechanical audit

A U.S. mill was having problems with faulty turnups. Valmet personnel arrived at the mill, performed a mechanical audit and made adjustments to fix the problem.

Headbox case study – Overcoming newsprint mill speed limit

The mill was concerned about speed limitations due to the current headbox status. They asked Valmet to diagnose the situation and recommend a course of action.

Press section case study - Inspection of premature felt failures

A mill had premature felt failures possibly due to CC roll failures. Valmet performed an inspection of the 3rd press felt run to see if this was the case.